---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/13339#article
headline: "13339: Gather: Invalid enhanced value"
url: https://www.twilio.com/docs/api/errors/13339
inLanguage: en
dateModified: 2026-10-27T17:52:37.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 13339: Gather: Invalid enhanced value

Log Type: APPLICATION

Log Level: WARNING

## Description

Twilio sends this warning when `<Gather>` receives an invalid `enhanced` value. Set `enhanced` to `true` or `false`; the default is `false`. The `enhanced` attribute is deprecated and applies only to the Google STT V1 `phone_call` model.

### Possible causes

* `enhanced` is set to a value other than `true` or `false`.

### Possible solutions

* Set `enhanced` to `true` or `false` in your `<Gather>` TwiML, or remove the attribute.
* Review the `<Gather>` request and TwiML to confirm the value Twilio received.

#### Additional resources

* [TwiML Voice: `<Gather>`](/docs/voice/twiml/gather#enhanced-deprecated)
* [Debugging Your Twilio Application](/docs/usage/troubleshooting/debugging-your-application)